'''
  Copyright FunASR (https://github.com/alibaba-damo-academy/FunASR). All Rights
  Reserved. MIT License  (https://opensource.org/licenses/MIT)
  2023 by burkliu(刘柏基) liubaiji@xverse.cn
'''

import logging
import argparse
import soundfile as sf
import time

import grpc
import paraformer_pb2_grpc
from paraformer_pb2 import Request, WavFormat, DecodeMode

class GrpcClient:
  def __init__(self, wav_path, uri, mode):
    self.wav, self.sampling_rate = sf.read(wav_path, dtype='int16')
    self.wav_format = WavFormat.pcm
    self.audio_chunk_duration = 1000 # ms
    self.audio_chunk_size = int(self.sampling_rate * self.audio_chunk_duration / 1000)
    self.send_interval = 100 # ms
    self.mode = mode

    # connect to grpc server
    channel = grpc.insecure_channel(uri)
    self.stub = paraformer_pb2_grpc.ASRStub(channel)
    
    # start request
    for respond in self.stub.Recognize(self.request_iterator()):
      logging.info("[receive] mode {}, text {}, is final {}".format(
        DecodeMode.Name(respond.mode), respond.text, respond.is_final))

  def request_iterator(self, mode = DecodeMode.two_pass):
    is_first_pack = True
    is_final = False
    for start in range(0, len(self.wav), self.audio_chunk_size):
      request = Request()
      audio_chunk = self.wav[start : start + self.audio_chunk_size]

      if is_first_pack:
        is_first_pack = False
        request.sampling_rate = self.sampling_rate
        request.mode = self.mode
        request.wav_format = self.wav_format
        if request.mode == DecodeMode.two_pass or request.mode == DecodeMode.online:
          request.chunk_size.extend([5, 10, 5])

      if start + self.audio_chunk_size >= len(self.wav):
        is_final = True
      request.is_final = is_final
      request.audio_data = audio_chunk.tobytes()
      logging.info("[request] audio_data len {}, is final {}".format(
        len(request.audio_data), request.is_final)) # int16 = 2bytes
      time.sleep(self.send_interval / 1000)
      yield request

if __name__ == '__main__':
  logging.basicConfig(filename="", format="%(asctime)s %(message)s", level=logging.INFO)
  parser = argparse.ArgumentParser()
  parser.add_argument("--host",
                      type=str,
                      default="127.0.0.1",
                      required=False,
                      help="grpc server host ip")
  parser.add_argument("--port",
                      type=int,
                      default=10100,
                      required=False,
                      help="grpc server port")
  parser.add_argument("--wav_path",
                      type=str,
                      required=True,
                      help="audio wav path")
  args = parser.parse_args()

  for mode in [DecodeMode.offline, DecodeMode.online, DecodeMode.two_pass]:
    mode_name = DecodeMode.Name(mode)
    logging.info("[request] start requesting with mode {}".format(mode_name))

    st = time.time()
    uri = '{}:{}'.format(args.host, args.port)
    client = GrpcClient(args.wav_path, uri, mode)
    logging.info("mode {}, time pass: {}".format(mode_name, time.time() - st))
